1. Superior Serum Concentrations with Posaconazole Delayed-Release Tablets Compared to Suspension Formulation in Hematological Malignancies
- Author
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Cumpston, Aaron, Caddell, Ryan, Shillingburg, Alexandra, Lu, Xiaoxiao, Wen, Sijin, Hamadani, Mehdi, Craig, Michael, and Kanate, Abraham S.
- Abstract
ABSTRACTPosaconazole (PCZ), approved for prophylaxis against invasive fungal disease in high-risk patients, is commercially available orally as a suspension formulation (PCZ-susp) and as a delayed-release tablet (PCZ-tab). We evaluated the serum steady-state concentrations (Css) of PCZ stratified by the administered formulation for antifungal prophylaxis in patients with myeloid malignancies (n= 150). The primary outcome was the attainment rate of the target Cssof ≥700 ng/ml. Secondary outcomes included toxicity assessment (hepatotoxicity and corrected QT [QTc] interval prolongation) and breakthrough fungal infections. Patients who received the PCZ-susp (n= 118) or PCZ-tab (n= 32) and had PCZ Cssassessment after at least 7 days of therapy were eligible. The median Cssin the PCZ-susp group was 390 ng/ml (range, 51 to 1,870 ng/ml; mean, 436 ng/ml) compared to 1,740 ng/ml (range, 662 to 3,350 ng/ml; mean, 1,781 ng/ml) in the PCZ-tab group (P< 0.0001). The percentages of patients achieving the target goal of ≥700 ng/ml were 17% versus 97%, respectively (P< 0.0001). Hepatotoxicity (grade 2 or higher) occurred in 1 patient in each group. QTc interval measurements were available for 32 patients in the PCZ-susp group and for 12 patients in the PCZ-tab group, and prolonged intervals of grade 2 or higher were noted in 9% (n= 3) and 17% (n= 2), respectively (P= 0.6). Breakthrough fungal infections in the PCZ-susp and PCZ-tab groups were 7% (n= 8) and 3% (n= 1), respectively (P= 0.68). We conclude that the use of PCZ-tab was associated with higher Cssand with the probability of achieving therapeutic goals without worsening of adverse effects.
- Published
- 2015
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